Speech detector for use in an adaptive hybrid circuit

Details Speech detector for use in an adaptive hybrid circuit Speech detector for use in an adaptive hybrid circuit

1979-11-29

1981-06-23

Atkinson, Charles E.

179 1P, 1791702, G10L 100

Patent

active

042752701

ABSTRACT:
A speech detector for use in an adaptive hybrid circuit is disclosed. The speech detector detects the instantaneous sign of current and voltage in a hybrid circuit and thereby determines the direction of power flow in the circuit. The direction of power flow is indicative of the presence or absence of a near end talker. The hybrid circuit enables or disables adaption based upon the presence or absence of the near end talker in the telephone system.

REFERENCES:
patent: Re30111 (1979-10-01), Blood
patent: 3621142 (1971-11-01), Bunting
patent: 3860768 (1975-01-01), Wehrmann
patent: 3878337 (1975-04-01), Fariello
patent: 3909532 (1975-09-01), Rabiner et al.
patent: 4213014 (1980-07-01), Luder
W. Ahern et al., "Speech Signal Power in the Switched Message Network", Bell Syst. Tech. J., Sep. 1978, pp. 2695-2726.

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